1991 - Present Professor and Chairman
Department of Pathology
University of Pittsburgh School of Medicine
Pittsburgh, Pennsylvania
Nov. 1995 - Nov. 1998 Interim Dean of the School of Medicine
University of Pittsburgh School of Medicine
Pittsburgh, Pennsylvania
1987 - 1991 Professor of Pathology
Duke University Medical Center
Durham, North Carolina
1983 - 1987 Associate Professor of Pathology
Department of Pathology
Duke University Medical Center
Durham, North Carolina
1977 - 1983 Assistant Professor of Pathology
Department of Pathology
Duke University Medical Center
Durham, North Carolina